<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>浏览器信息</title>
</head>

<body>
       
    <script>
        // 02_获取浏览器的以下信息：
        // 获取的浏览器的整体信息
        console.log(window.navigator.userAgent);

        // // 获取浏览器的名称
        // console.log(window.navigator.appName);

        // // 浏览器的版本号
        // console.log(window.navigator.appVersion);

        // // 当前计算机的操作系统
        // console.log(window.navigator.platform);   

        function demoUserAgent() {
            var sBrowser, sUsrAg = window.navigator.userAgent;

            // The order matters here, and this may report false positives for unlisted browsers.

            if (sUsrAg.indexOf("Firefox") > -1) {
                sBrowser = "Mozilla Firefox";
                // "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0"
            } 
            
            else if (sUsrAg.indexOf("Opera") > -1 || sUsrAg.indexOf("OPR") > -1) {
                sBrowser = "Opera";
                //"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 OPR/57.0.3098.106"
            } 
            
            else if (sUsrAg.indexOf("Trident") > -1) {
                sBrowser = "Microsoft Internet Explorer";
                // "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; Zoom 3.6.0; wbx 1.0.0; rv:11.0) like Gecko"
            } 
            
            else if (sUsrAg.indexOf("Edge") > -1) {
                sBrowser = "Microsoft Edge";
                // "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 Edge/16.16299"
            } 
            
            else if (sUsrAg.indexOf("Chrome") > -1) {
                sBrowser = "Google Chrome or Chromium";
                // "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/66.0.3359.181 Chrome/66.0.3359.181 Safari/537.36"
            } 
            
            else if (sUsrAg.indexOf("Safari") > -1) {
                sBrowser = "Apple Safari";
                // "Mozilla/5.0 (iPhone; CPU iPhone OS 11_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/11.0 Mobile/15E148 Safari/604.1 980x1306"
            } 
            
            else {
                sBrowser = "unknown";
            }

            alert("当前浏览器为: " + sBrowser);
        }
        demoUserAgent()

    </script>
</body>

</html>